Figure 17: AQI Forecast Map. Same-day and next-day air quality forecasts for the United States can be found at http://airnow.gov. This on-line map shows forecasts for various pollutants by location. State and local agencies continually provide data for the forecasts, which are based on EPA's Air Quality Index (AQI). Clicking on a state on the forecast map links you to Web sites with information about air pollution in that location.